“Yours” began with a soundie, a film made for projection in a “film jukebox” in 1945. It was a popular song in its day and, with its sentiment of eternal love, feels poignant in the context of the Second World War and all its separated loves. “Yours” is performed here by the Roberts Brothers and the Bunnell Sisters, who appear to be two sets of twins, and the film’s built-in do......